Compositions: coating or plastic – Coating or plastic compositions – Marking
Patent
1977-04-07
1979-11-06
Vertiz, O. R.
Compositions: coating or plastic
Coating or plastic compositions
Marking
65 33, 106 398, C03C 322
Patent
active
041734840
ABSTRACT:
A mixture is prepared from quartz sand, dolomite and/or limestone, sodium carbonate and/or cryolite and having a composition of from about 30 to about 60% SiO.sub.2, from 0 to about 5% Al.sub.2 O.sub.3 from 0 to about 2% FeO+Fe.sub.2 O.sub.3, from about 5 to about 30% MgO, from about 20 to about 40% CaO, and from about 2 to about 10% Na.sub.2 O and/or K.sub.2 O. Within the above limits the ratio of the components can vary within the following ranges: SiO.sub.2 /CaO=1.6-2.25, SiO.sub.2 /MgO=2.8-5.7, CaO/MgO=1.5-3.4, SiO.sub.2 +MgO=2.8-5.7, SiO.sub.2 /CaO+MgO=1-1.42.
The foregoing mixture is melted between 1,250.degree. and 1,400.degree. C., then it is allowed to stand, depending on the mass and the casting form used, for a period of 1-4 hours. The melt is cooled in the casting forms between 1,250.degree. and 1,050.degree. C. for a period of 0.5 to 1.5 hours, with or without maintenance of a substantially constant temperature within that temperature range for 15-90 minutes while spontaneous crystallization takes place without reheating and without the presence of a nucleating agent. After crystallization the shaped mass is cooled at a rate of between 10.degree. and 200.degree. C./hour.
The resulting product can be white, or if a coloring metal and/or metal compound is added, then colored throughout the body of the material, having a single crystalline phase with the individual crystalline aggregates being in the order of magnitude of about a millimeter to about a centimeter. The resulting product is resistant against acids and bases and has an easily polishable natural crystalline surface.
REFERENCES:
patent: 3170780 (1965-02-01), Takehara et al.
patent: 3231456 (1966-01-01), McMillan et al.
patent: 3804608 (1974-04-01), Gaskell et al.
patent: 3928047 (1975-12-01), Kapolyl et al.
Kaszatnitzky Ferenc
Kubovits Imre
Meszaros Imre
Ottlik Peter
Szabo Mrs. Laszlo
Langel Wayne A.
Tatabanyai Szenbanyak
Vertiz O. R.
LandOfFree
Artificial stone and method for making does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Artificial stone and method for making, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Artificial stone and method for making will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-461037